The ionic product of water is 0.11 x ${{10}^{-14}}$ at 273 K, 1 x ${{10}^{-14}}$ at 298 K and 7.5 x ${{10}^{-14}}$ at 373. Deduce from this data whether the ionization of water to Hydrogen and Hydroxide ion is exothermic or endothermic?

equilibrium
cbse

#1

According to the data the value of is increasing with temperature. Therefore according to Le-Chatelier’s principle the ionisation of water is endothermic.